The two species P. pemaquidensis and P. aestuarina have a surface coat that consists of tiny discrete bodies termed "glycostyles". The glycostyles are organic (not mineralized), cover the entire cell surface, and appear to be formed in the Golgi. They may sometimes appear to be hexagonal in outline, and are seldom taller than broad. Some but not all strains of P. pemaquidensis and P. aestuarina also have hairlike filaments that arise from the cell membrane.
|No surface coat has been found in the parasitic species P. invadens and P. perniciosa.|
|PARASOME. The parasome is bounded by two membranes. Within these membranes there are three distinct structures that are also bounded by two membranes: two peripheral bodies and one central body. These are the structures within the parasome that show the positive reaction to DNA-binding dyes and fluorochromes. There is a limited amount of cytoplasm within the parasome that is not contained within either the peripheral or the central bodies.|
OTHER ORGANELLES. As far as is known, all species of
Paramoeba have one nucleus
per cell. The nucleus has a single, centrally located, essentially
Each cell has several sausage-shaped, unbranched mitochondria. The cristae are tubular.
The finger-like pseudopodia ("dactylopodia") may have a central core of fine fibrils. Such fibrils are not commonly observed in other amoebae. The composition and function of these fibrils is not known.
Some species, P. eilhardi especially, harbor endosymbiotic bacteria.
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